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<p>B<sub>2</sub>O<sub>3</sub>–Bi<sub>2</sub>O<sub>3</sub>–ZnO–BaO (BBiZBa) glasses with varying Bi<sub>2</sub>O<sub>3</sub> content were prepared by the conventional melt-quenching technique to elucidate composition–property relationships relevant to nonlinear optics. Structural features were assessed using X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, confirming predominantly amorphous glass formation across the series. Optical absorption was analyzed by ultraviolet–visible spectroscopy, and the optical band gap (E<sub>g</sub>) was determined from Tauc analysis. Increasing the Bi<sub>2</sub>O<sub>3</sub> content systematically reduces E<sub>g</sub>, indicating a modification of the band structure associated with compositional restructuring of the glass network. Nonlinear optical parameters were evaluated from the linear optical constants, revealing an increase in the third-order nonlinear optical susceptibility (<i>χ</i><sup>3</sup>) with Bi<sub>2</sub>O<sub>3</sub> incorporation. These results demonstrate that Bi<sub>2</sub>O<sub>3</sub>-enriched BBiZBa glasses provide a promising compositional route toward enhanced nonlinear optical response, supporting their potential use in nonlinear optical and photonic device applications.</p>

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Compositional and optical characterization of B2O3–Bi2O3–ZnO–BaO glasses for nonlinear optical applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月12日

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  • Eman N. Serag,
  • O. M. Hemeda,
  • Mohamed M. Salem,
  • Moustafa A. Darwish,
  • Ibrahim Morad,
  • S. A. Abdel Gawad

摘要

B2O3–Bi2O3–ZnO–BaO (BBiZBa) glasses with varying Bi2O3 content were prepared by the conventional melt-quenching technique to elucidate composition–property relationships relevant to nonlinear optics. Structural features were assessed using X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, confirming predominantly amorphous glass formation across the series. Optical absorption was analyzed by ultraviolet–visible spectroscopy, and the optical band gap (Eg) was determined from Tauc analysis. Increasing the Bi2O3 content systematically reduces Eg, indicating a modification of the band structure associated with compositional restructuring of the glass network. Nonlinear optical parameters were evaluated from the linear optical constants, revealing an increase in the third-order nonlinear optical susceptibility (χ3) with Bi2O3 incorporation. These results demonstrate that Bi2O3-enriched BBiZBa glasses provide a promising compositional route toward enhanced nonlinear optical response, supporting their potential use in nonlinear optical and photonic device applications.